This gives me an insight into your point of view.
What about what was foretold in Isaiah 26:19?
But your dead will live, Lord; their bodies will rise— let those who dwell in the dust wake up and shout for joy— your dew is like the dew of the morning; the earth will give birth to her dead.
What about Romans 8:11?
If the Spirit of him who raised Jesus from the dead dwells in you, he who raised Christ Jesus from the dead will give life to your mortal bodies also through his Spirit who dwells in you.
And that business with Thomas putting his fingers into His wounds and his hand into His side? What was that about?
“And that business with Thomas putting his fingers into His wounds and his hand into His side? What was that about?”
How best to prove to Thomas Jesus was alive? Angels had the ability to produce a body that could eat, be grappled with, able to hold hands with someone, be lusted after!, so why not Jesus having that same ability? Even if that body did look the same during one of his appearances.
Romans 8:11 says nothing about going to heaven or fleshly bodies going into heaven, note vs. 10 and the sense in which the body is dead and given life.
Paul says that if God could raise Christ he could raise those Corinthians from being dead in their sins. (vs 11).
“What about what was foretold in Isaiah 26:19?”
A resurrection is foretold but there is no hint of any heavenly resurrection being spoken of, a privilege not open before Christ, least of all an assumption of fleshly bodies into heaven.
In fact Isa. 25:8 was referenced by Paul (1 Cor. 15:54) and applied to the resurrection to spirit bodies and with that, immortality. That was not available before Christ so Isa. 26:19 would apply to those who would be subjects of God's Kingdom, not it's rulers.